Re: hand rotation / prosauropods

["David Marjanovic" <david.marjanovic@gmx.at>]

> In particular, given that sauropod ancestors were likely (a)
> relatively large, and (b) relatively abundant, being herbivores, it
> seems unlikely that they would have escaped preservation for so long.

Well, *Isanosaurus* did... Thanks for all the information. BTW, it's
*Blikan_a_saurus*.

Regarding oxygen percentages at high altitudes... is there less higher up
almost only because there is less air overall higher up, or does the effect
that oxygen is heavier than nitrogen and therefore accumulates lower down
play a significant role? Does someone know?